Microwave response of YBa2Cu3O6.95 crystals: Evidence for a multicomponent order parameter

被引：62
|
作者：
Srikanth, H [1 ]
Willemsen, BA [1 ]
Jacobs, T [1 ]
Sridhar, S [1 ]
Erb, A [1 ]
Walker, E [1 ]
Flukiger, R [1 ]
机构：
[1] UNIV GENEVA,DPMC,CH-1211 GENEVA 4,SWITZERLAND
来源：
PHYSICAL REVIEW B | 1997年 / 55卷 / 22期
关键词：
D O I：
10.1103/PhysRevB.55.R14733
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
New features are reported in precision measurements of the complex microwave conductivity of high-quality YBa2Cu3O6.95 crystals grown in BaZrO3 crucibles. A third peak in the normal conductivity, sigma(1)(T), at around 80 K, and enhanced pair conductivity sigma(2)(T) below similar to 65 K are observed. The data are inconsistent with a single order parameter, and instead are indicative of multicomponent superconductivity. Overall, these results point to the presence of multiple pairing interactions in YBa2Cu3O6.95 and also provide a natural explanation to account for the low-temperature 35-K conductivity peak observed in all YBa2Cu3O6.95 crystals.
引用
收藏
页码：14733 / 14736
页数：4
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